<span ng-if="::controller.ref === undefined"
      title="This URN points to AFF4 location not accessible from the UI">
  <em>{$ ::controller.plainValue $}</em>
</span>
<a ng-if="::controller.ref !== undefined" ng-href="{$ ::controller.ref $}"
   ng-click="controller.onClick()">{$ ::controller.plainValue $}</a>
